Calculate your loss months of rents if you have to eat this for a year or more, plus the attorney costs, plus whatever damage he decides to do, plus the emotional strain, and compare all that to paying a few grand now to be done.  

From my perspective - the more you get to know your tenants, the more likely you are to let emotions rule instead of logic.

Use PO boxes, 800/local voice mailboxes and professional PMs.I could walk past most of my tenants on the street and would not know who the heck they are.I abhor drama and secondary markets are emotional drama epicenters.

The probate property is gone and the heirs have no recourse but to bid against you if they still have emotional attachment to the property.

That is an emotional decision rather than a rational one.  

Often anyone who fails to pay their taxes has also failed to pay other people in a way that results in property liens.Physical security can be a concern as losing a house is often an emotional affair, and some auction investors have had to face assault by the previous owner during attempts at due diligence at the property site.One notorious investor I'm aware of quotes Sun Tzu with "Victorious warriors win first, and then go to war, while defeated warriors go to war first and then seek to win." 

They're mentally, physically and emotionally depleted.

Paying this off will do more for you mentally and emotionally than the hair splitting math of 3% debt vs 4-5% returns on $10k.

It's obvious, sir, that you have a superficial and emotional understanding of wholesaling.

We were thinking about selling, I love this house I’m in a growing at, it’s my very first primary home so I am letting emotions get in the way but my wife and I are considering it.